Switch to getting the source from Git

The GitHub release source bundle doesn't include the submodule files,
while the GitHub release assets do include the submodule files but
exclude other things like the test directories.  To make things simpler,
just clone the Git repository directly, since we know that includes
everything, and Cygport's git cygclass will pull the submodules
automatically.

taskwarrior.cygport

@@ -6,11 +6,13 @@ SUMMARY='Command line task management'
 DESCRIPTION='Taskwarrior is a command line task list management utility with a
 multitude of features'
 HOMEPAGE=https://taskwarrior.org/
-SRC_URI="https://github.com/GothenburgBitFactory/taskwarrior/archive/refs/tags/v${PV}.tar.gz"
+GIT_URI=https://github.com/GothenburgBitFactory/taskwarrior
+GIT_TAG="v$PV"
 LICENSE=MIT
 
 BUILD_REQUIRES='cmake gcc-fortran ninja libuuid-devel libgnutls-devel'
 
 inherit cmake
+inherit git
 
 # vim: set noexpandtab tabstop=8 listchars=tab\:\ \ ,trail\:-,lead\:-